TSI Instruments Aerotrak 9303 - CHAPTER 7 Contacting Customer Service; Technical Contacts; International Contacts

General Maintenance–Model 9303 2-23
9. Pull the laser board away from the optics block and fold it back to
expose the laser diode. Use a needle-nosed plier to grab the laser
diode and gently pull the laser diode out of the sockets on the laser
board.
10. Remove laser diode from service kit 9303 Laser (S7000009). Install
the new laser with plastic spacer into the laser board.
11. Position the laser/laser board assembly back into the optics block
and re-attach with the two screws. Leave the screws loose for
alignment later.